Roller-mill



(No Model.) 3 Sheets-Sheet 1. S. R. CAMPBELL.

ROLLER MILL.

No. 310,374. Patented Jan. 6, 1885.

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3 SheetS Sheet 2.

(No Model.)

SQR. CAMPBELL.

ROLLER MILL.

Patented Jan. 6, 1885.

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(No Model.) 3 Sheets-Sheet 3. S. R. CAMPBELL. ROLLER MILL.

N 310,374. Patented Jan. 6, 1885 Unirnn STATES Parana OFFICE.

SAMUEL 1i". CAMPBELL, OF BUFFALO, NETV YORK.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 310,374, dated January6, 1885.

Application filed March 13, 1883. No model.)

To wZZ whom, it 72mg concern:

Be it known that I, SAMUEL R. CAMPBELL, of the city of Bufi'alo, in thecounty of Erie and State of New York, have invented new and usefulImprovements in Roller-Mills, of which the following is a specification.

This invention relates more particularly to that class of roller-millswhich are employed in the reduction of grain and similar substances, andhas for its object to facilitate the adjustment and manipulation of therollers in such manner that the roller which is mounted in movablebearings can be readily separated from the opposite roller for stoppingand starting the mill without affecting the adjustment of the roller,and so that each end of the movable roller can be separately adj usted,and that both ends can also be simultaneouslyadjusted, whereby themovable roller is rendered ea pable of a quick and free movement towardand from the opposite roller, and at the same time is rendered capableof a very fine adj ustment in order to adapt the rollers to the desiredwork.

My invention consists of the improvements which are hereinafter fullydescribed, and pointed out in the claims.

In the accompanying drawings, consisting of three sheets, Figure 1 is anend elevation of the mechanism whereby the roller mounted in movablebearings is adjusted toward and from the opposite roller. Fig. 2 is aplan view thereof. Fig. 3 is a vertical section in line at a, Fig. 2, onan enlarged scale. Fig. 4 is a vertical section, 011 an enlarged scale,in line y 9 Fig. 2. Fig. 5 is a cross-section in line cc :0, Fig. 4.Fig. 6 is a horizontal section in line 3/ y, Fig. 4. Fig. 7 is across-section in line 2 2, Fig. at. Fig. Sis a horizontal section inline a: m, Fig. 3. Fig. 9 is a top plan view representing the adjustingcontrivances of a series of roller-mills arranged side by side and allconnected together, so as to be adjusted simultaneously. Fig. 10 is afragmentary view of the adjusting-lever. Fig. 11 is a fragmentary viewof the connecting-rod which is attached to the said lever. Fig. 12 is acrossseetion of these parts.

Like letters of reference refer to like parts in the several figures.

A represents the roller which is mounted in movable bearings, and A isthe opposing roller. a are the journals of the roller A, and a are thebeari n gs in which the journals (0 turn.

B represents the stationary frame of the machine, and Z) the ways uponwhich the bearings a move toward or from the roller A in adjusting theroller A toward or from the roller A.

c are horizontal rods adj ustably secured at their inner ends tobearings a by means of screw-threads c and screw-nuts 0 the rods beingarranged in bores extending through the lower portions of the bearings,as clearly shown in Fig. 3, and the screw-nuts 0 being held againstturning in sockets of the bearings.

(Z represents sleeves through which the outer portions of the screwbolts or rods 0 pass. The sleeves d are provided with externalscrewthreads working in threaded openings in lugs D, cast on or securedto the frame 13, whereby the sleeves are made adjustable in the line ofthe screw-bolts c. The outer ends of the sleeves d are provided withheads d,whereby they can be turned in inserting them into the lugs D.

0 represents a screw-nut which is applied to the inner threaded portionof each sleeve (1, and E represents a spiral or other suitable springinterposed between each screw-nut e and the outer side of the adjacentbearing a. The springs E tend to hold the bearings a against thescrew-nuts c, and to draw the bolts 0 inwardly toward the opposingroller, and they also permit the hearings to yield when an unusuallylarge or hard particle enters between the rollers. The screw-nuts 0permit the tension of the springs to be adjusted.

F represents the hand wheels,whieh are attached to the outer ends of thescrew-bolts c by means of screw-threads and feathers or keys for turningthe same, and f are collars arranged upon the screw-bolts c on the innersides of the hand-wheels F.

G G represent two levers, whereby the two secured to the inner sides ofthe heads (1 of the threaded sleeves d. The supports 9 are each providedwith two arms, g,which straddle the lever G and project into recesses 9formed on the inner side of the lever,as clearly shown in Figs. 2, 3,and S. The outer end, r ,of each lever straddles the screw-bolt cbetween the collar f and the sleeved, and bears against the inner sideof the collarf, the latter being constructed with a projection whichenters arecess or notch in the end of the lever, as clearly shown inFigs. 2 and 8. The bearing'points of each lever are arrangedsubstantially in a straight line at right angles to the bolt 0, wherebythe lateral motion of the lever is reduced to a minimum. The inner ends,g, of the levers G G straddle a horizontal bolt, h, which is secured toa bracket or support, H, secured to the frame 13.

I represents an adjusting sleeve or nut, which is applied to the bolt h,and which bears against the outer sides of the inner' ends, 9, of thelevers G. As represented in Figs. 4 and 6,

the sleeve I is provided with an internallyscrow-threaded bore, 2, inwhich engages a threaded sleeve, J, which is also movable on the bolt71/. The outer portion of the latter, upon which the sleeve J moves, isprovided with a longitudinal slot, it, through which passes a bar, Z,which is secured to or forms part of the sleeve J.

M represents an adj Listing-lever, which is pivoted in the slot 7- atthe outer end of the bolt h, and which is provided at is pivoted endwith an eccentric, m, which bears against the bar Z of the sleeve J, asclearly shown in Figs. 4 and (5.

The pressure of the springs E draws the bolts 0 and the hand-wheels Fandthe collars f, mounted on the outer ends of the said bolts, inwardlyand against the outer ends, of the levers G. The latter are therebygiven a tendency to rock on their pivotal supports, throwing the innerends, 9', outwardly against the sleeves I and J and holding the latteragainst the eccentric m of the lever M. \Vhen the latter is in theposition represented in Figs. 4: and 6, the rollers A A are in theirworking position.

Upon swinging the lower end of the lever M upwardly the eccentricmforces the collars J and I and the inner ends of the levers inwardly,thereby swinging the outer ends, 9, of the levers outwardly andcompressing the springs E and drawing the roller-bearings (1/ outwardly,so as to separate the roller A from the roller A. The back m of theeccentric m is concentric with the lever M, so that when the lever isswung to its highest position the lever will be retained in thatposition by the pressure of the springs holding the collar J against theconcentric portion of the face of the eccentric m. A simple upwardmovement of the lever M moves both hearings to and the roller Aoutwardly a sufficient distance to free the workingfaces of the rollers,and a simple reverse movement of the lever M returns the roller A to itsformer position without in any way disturbing-its adjustment.

Upon turning the screw-sleeve I, which is provided with projections forfacilitating this operation, the inner ends of the levers G can be movedinwardly or outwardly, thereby causing a proportionately smallermovement in the outer ends, 9, of the levers and a cor respondingsimultaneous adjustment of both roller-bearings a. As the linearmovement of the inner ends of the levers G, caused by the turning of thescrew-sleeve I, is considerably reduced, owing to the great differencebetween the two arms of each lever, a very fine simultaneous adjustmentof both bearings of the movable roller is rendered possible bythismechanism.

By turning the hand-wheels F at the outer ends of the screw-bolts 0either roller-bearing can be adjusted separately whenever it may becomenecessary in order to render the working-faces ofthe rollers parallelwith each other. The several prongs of the screw-sleeve I are preferablyprovided with distinguishing numbers or letters to facilitate theadjustment of the sleeve.

Instead of pivoting the lever M in the slot of the bolt h, the lever maybe provided with a sleeve turning on the bolt, and provided with aneccentric or cam shaped face pressing against the sleeve J, or with acam-shaped groove engaging with a stud on the sleeve J, the lever beingheld against outward move ment by a collar on the stud h.

\Vhen two or more roller-mills are arranged side by side,itis oftendesirable that the rollers should be separated simultaneouslyin all theseveral mills in starting and stopping the same. This is readilyaccomplished by arranging the adj ustinglevers M in the several mills inahorizontal position, as represented in Fig. 9, instead of in a verticalposition, as represented in Figs. 4t and 6, and connecting the severallevers by a rod or rods, a. In order to adapt the length of theconnecting-rods a to varying distances between the levers M, the rodsare preferably connected by sleeve couplings, which may engage withright and left hand threads on the adjacent ends of the rods, and permittheir ends to be drawn together or separated, as may be necessary inorder to connect the levers H. If preferred, the coupling-sleeves may beattached to the rods by set-screws.

The levers M are provided with elongated openings 1), through which passbolts 1;,which pass also through openings 12* in the connect ing-rods a,and whereby the rods are attached to the levers in such manner that theconnection can be readily broken by removing the bolt 1) when it isdesired to operate one par ticular lever independently of the other le-'vers. Each bolt 1) is provided with an enlarged shank, p, which fits inthe opening p of the rod or, and it is provided below the lever M with akey or cross-pin, 1;, which can be passed through the elongated portionof the opening and the round opening 12 in inserting the bolt, and whichlooks the parts together by giving the bolt a quarter-turn.

I claim as my invention- 1. The combination, with the bearings of themovable roller, of levers G G, mechanism whereby said levers areconnected with said bearings, an adjusting-nut, I, whereby both leversmay be simultaneously adjusted, and an eccentric or cam lever, M,whereby both levers G can be moved without disturbing their adjustment,substantially as set forth.

2. The combination, with the bearings of the movable roller, of thelevers G G, mechanism whereby the levers are connected with saidbearings, a bolt, h, scre wsleeves I and J, and eccentric or cam leverM, substantially as set forth.

3. The combination, with the roller A and bearings a, of the screw-rodsq,screw-threaded sleeves d, nuts 6, springs E, levers G G, hand wheelsF, bolt 7;, screw threaded sleeves I and J, and eccentric-lever M,substantially as set forth.

ft. The combination, with the roll-adjust- .ing mechanism andadjusting-levers M of two SAML. R, CAMPBELL.

Vitnesses:

Grills. F. GEYER, JNO. J. BONNER.

